Guardians Of The Galaxy 2 Groot, a sentient tree-like being, starts as a member of the Guardians of the Galaxy. Despite having limited vocabulary and only saying "I am Groot," he forms a strong bond with his teammates. Sacrificing himself to save them, he regenerates as Baby Groot. Over time, Groot grows back into his full-size form, aiding the Guardians in their adventures while showcasing his gentle and loyal nature. Groot's selflessness and resilience make him an essential part of the team, embodying the essence of "We are Groot."